This is what every great coach of every movement sport says, certainly not an original theory or opinion, its the basis of movement sports. Teach the fundamentals and the player will adapt them to the situation. Kobe, MJ's jump shots have the same fundamentals, they then adapted them as needed. Same with tennis, same with all dynamic sports.
Exactly, if you cannot hit a basic slice FH, I guarantee you are not going to hit the "squash" shot from behind your body when you are on the full run. You must have the basic technique in order to "adapt" to dynamic situations.